Delete files that are undeletable. [/B] Open a Command Prompt window and leave it open. Close all open programs. Click S tart, Run and enter TASKMGR.EXE Go to the Processes tab and End Process on Explo rer.exe. Leave Task Manager open. Go back to the Command Prompt window and chang e to the directory the AVI (or other undeletable file) is located in. At the com mand prompt type DEL where is the file you wish to delete. Go back to Task Manag er, click File, New Task and enter EXPLORER.EXE to restart the GUI shell. Close Task Manager.